Last updated: August 21, 2025
December weather in Zaventem, Belgium is characterized by a chilly atmosphere, with average temperatures hovering around 6°C (42°F), reaching a maximum of 15°C (60°F) during the warmest days, while nights can dip to a brisk -5°C (23°F). This month experiences significant precipitation, totaling about 88 mm (3.5 in) over 16 days, contributing to a notably high humidity level of 92%. As winter takes hold, prepare for a blend of cool temperatures and wet weather, making it a true hallmark of the season in this picturesque Belgian town.
In December, Zaventem, Belgium experiences a chill as temperatures drop, with minimums averaging around -5°C (23°F), setting the stage for a wintry atmosphere. Daytime highs, however, are considerably milder, peaking at 15°C (60°F), resulting in an average temperature of 6°C (42°F). This month acts as a transitional phase, bridging the colder, harsher conditions of winter that precede it with a hint of the milder days of the new year. Overall, December's temperatures reflect a delightful contrast between the biting cold and the potential for relatively warmer spells, inviting residents and visitors to embrace the cozy charm of the season.
In December, Zaventem experiences a significant uptick in precipitation, with 88 mm (3.5 in) recorded, marking it as the wettest month of the year. Over 16 days of the month, rain showers become a frequent occurrence, nearly doubling the rainfall of the drier months like April. This surge in precipitation aligns with the transition to winter, as the region often sees increased cloud cover and stormy weather. Compared to the preceding months, December’s consistent rain falls suggests a shift into colder, wetter conditions, setting the stage for a true Belgian winter.
December in Zaventem, Belgium, marks the end of the year with a notable humidity level of 92%, mirroring the high levels experienced in November. As winter sets in, the moisture in the air increases, creating a marked contrast to the summer months when humidity dips to a comfortable 76% in August. The trend throughout the year reveals a gradual decline in humidity from the spring, peaking in late autumn before settling at this elevated level in December. Such high humidity during the winter months can contribute to a chillier sensation, emphasizing the need for cozy indoor spaces as the colder season deepens. Overall, the data illustrates a clear seasonal rhythm, with humidity consistently rising during the late fall and winter months, creating a distinct atmospheric profile for Zaventem.
In Zaventem, Belgium, the UV Index experiences a notable decline as winter sets in, culminating in a December UV Index of 1, categorized as low, which means you can enjoy the outdoors with minimal risk of sunburn. This trend reflects a gradual cooling from the summer months, where the UV Index peaks at 8 in June and July, emphasizing the need for more sun protection during those warmer days. As the year progresses, the exposure risk diminishes significantly, allowing for a comfortable outdoor experience even in the chilly winter air, with a burn time of 45 minutes. For more detailed insights about UV levels throughout the year, visit Zaventem UV Index.
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December in Zaventem, Belgium, sees a gentle decline in sunshine hours, totaling 143 hours. As winter settles in, the days are significantly shorter compared to the vibrant summer months, which peak at 411 hours in July. However, this reduction reflects a broader seasonal trend—sunshine steadily increases from 120 hours in January, building up to a peak in late spring and early summer. Though December's sunlight is modest, it serves as a comforting reminder of the vibrant sunny days that will return, creating a rhythmic cycle that residents look forward to with every passing season.
In Zaventem, Belgium, the likelihood of enjoying sunny weather in December is relatively low, with only a 17% chance of encountering clear skies. This trend reflects a consistent pattern of diminishing sunlight as the year progresses, particularly evident when compared to the more promising months like April, which boasts a 47% chance of sunshine. The decline in sunny days is especially stark from November's 23% down to December, underscoring the winter's encroachment. As temperatures drop and clouds become more prevalent, December is typically a time for cozy indoor activities rather than basking in the sun.
In Zaventem, Belgium, December marks the end of the year with the shortest daylight duration, providing just 7 hours of natural light. This decline in daylight follows a gradual ebb, as the higher sunlit hours peak in June at a generous 16 hours. The trend is clear: as winter approaches, daylight dwindles from the 15 hours experienced in July to a mere 8 hours in November. This shift highlights a significant decrease in sunshine, creating a cozy, yet dim atmosphere as the year wraps up. As residents look forward to longer days, December stands as a reminder of the seasonal cycle, where daylight hours gradually reclaim their presence in the coming months.
As December sweeps into Zaventem, the winds begin to pick up again, averaging 3.9 m/s (9 mph), slightly higher than the calm of earlier months. This invigorating breeze marks a subtle transition from the quieter gusts of summer and autumn, when wind speeds dipped to a low of 2.7 m/s (6 mph) in June and September. The trend towards increased wind velocity in the latter part of the year is noticeable, with December's breezes reminiscent of **October's lively 4.1 m/s. This revitalizing wind not only adds a brisk chill to the air but also signals the approach of winter, inviting locals to embrace the season with warmth and cheer.
Weather in Zaventem varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Zaventem, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January exhibit distinct weather patterns as winter progresses. In December, temperatures range from a chilly -5°C (23°F) at night to a milder 15°C (60°F) during the day, with an average of 6°C (42°F). The month is characterized by high humidity at 92% and considerable precipitation, accumulating to 88 mm (3.5 in) over 16 days. In contrast, January sees slightly colder conditions with a minimum temperature of -6°C (21°F) and a lower average of 4°C (40°F). The maximum temperature drops to 14°C (58°F), and precipitation decreases to 62 mm (2.4 in) over 11 days, while humidity remains relatively high at 91%. For a detailed look at January weather specifics, you can check Zaventem weather in January.
December and February present distinct yet somewhat similar weather experiences. In December, temperatures range from a chilly -5°C (23°F) at night to a mild 15°C (60°F) during the day, with an average of 6°C (42°F). This month sees more precipitation, accumulating to 88 mm (3.5 in) over about 16 days, alongside higher humidity levels at 92%. In contrast, February features slightly colder nights with temperatures dropping to -9°C (16°F) but enjoys warmer daytime highs up to 19°C (66°F), maintaining the same average of 6°C (42°F). Precipitation decreases to 67 mm (2.6 in) over fewer days (12), and humidity decreases slightly to 89%. For more detailed insights into February's weather, you can check Zaventem weather in February.
December and March exhibit notable differences in weather patterns. In December, temperatures range from a chilly minimum of -5°C (23°F) to a moderate maximum of 15°C (60°F), with an average of 6°C (42°F). This month experiences higher precipitation at 88 mm (3.5 in) over 16 days, and humidity levels peak at 92%, creating a damp and often overcast atmosphere.
In contrast, March presents milder temperatures with a minimum of -7°C (19°F) and a maximum of 23°C (74°F), averaging around 7°C (46°F). Precipitation is lighter at 68 mm (2.7 in) across 13 days, and humidity is slightly lower at 87%, leading to a fresher feeling as spring approaches. For more details on the specific weather conditions in March, you can check Zaventem weather in March.
December weather tends to be quite cold, with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 15°C (60°F), averaging around 6°C (42°F). The month is also marked by high humidity at 92% and frequent precipitation, with 88 mm (3.5 in) spread over 16 days. In contrast, April brings a noticeable warming trend, with temperatures fluctuating from -4°C (26°F) to a much milder 28°C (82°F), and an average of 10°C (51°F). The precipitation drops significantly to 35 mm (1.4 in) and occurs over just 7 days, along with a slight decrease in humidity to 85%. For more specific details about April weather, you can visit Zaventem weather in April.
In December, the weather is quite cold, with temperatures ranging from a chilly -5°C (23°F) at night to a mild 15°C (60°F) during the day, contrasted by much higher humidity levels at 92%. This month also experiences considerable precipitation, averaging 88 mm (3.5 in) over 16 days, making it feel quite damp.
In comparison, May brings a significant warming trend, with temperatures ranging from a minimum of 1°C (34°F) to a pleasant maximum of 32°C (89°F). The average temperature rises to around 14°C (57°F), and while there is still some rainfall, it averages only 57 mm (2.3 in) over 12 days, accompanied by lower humidity at 82%. For more details on the weather in May, you can check Zaventem weather in May.
In December, temperatures in Zaventem range from a chilly -5°C (23°F) at night to a mild 15°C (60°F) during the day, with an average of around 6°C (42°F). The month tends to be quite humid, with humidity levels reaching 92%, and precipitation is frequent, occurring on 16 days and totaling 88 mm (3.5 in). In contrast, June brings warmer weather, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 33°C (92°F), averaging 18°C (65°F). The humidity decreases slightly to 82%, and there are fewer rainy days, with total precipitation at 64 mm (2.5 in) over just 9 days. For more information on the weather patterns in June, you can visit Zaventem weather in June.
When comparing the weather in December and July, it’s clear that the two months present drastically different climates. December tends to be much colder, with average temperatures around 6°C (42°F) and nighttime lows dipping to -5°C (23°F). In contrast, July boasts much warmer conditions, with average highs reaching 19°C (67°F) and a peak of 39°C (103°F). Additionally, December experiences higher humidity levels at 92% compared to July's 80%, contributing to a more pervasive chill. Rainfall is more frequent in December, occurring on 16 days with a total precipitation of 88 mm (3.5 in), while July sees relatively less rain over 10 days, with 71 mm (2.8 in) of precipitation. For more details on July weather in Zaventem, you can check Zaventem weather in July.
When comparing the weather in December and August, significant differences emerge. December is characterized by colder temperatures, with averages around 6°C (42°F) and nighttime lows reaching as low as -5°C (23°F). The month experiences higher humidity at 92% and sees considerable precipitation, with rain falling on 16 days and totaling 88 mm (3.5 in). In contrast, August boasts milder and much warmer conditions, with average temperatures around 19°C (67°F) and highs reaching up to 36°C (96°F). The humidity is relatively lower at 76%, and precipitation is less frequent, occurring over 13 days with a total of 74 mm (2.9 in). For more specific details on the climate during this summer month, check Zaventem weather in August.
In December, the weather becomes significantly colder, with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 15°C (60°F) and an average temperature of 6°C (42°F). The month sees considerable precipitation, totaling 88 mm (3.5 in) over 16 days, accompanied by high humidity levels at 92%. In contrast, September offers a much milder climate, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 33°C (93°F), and an average temperature of 16°C (60°F). Precipitation is less frequent in September, totaling 50 mm (2.0 in) over only 9 days, and humidity is slightly lower at 82%. For a more detailed look at September’s weather, you can visit Zaventem weather in September.
December weather in Zaventem is characterized by colder temperatures, with minimums dropping to -5°C (23°F) and an average of 6°C (42°F), compared to October, which enjoys milder conditions with a minimum of 2°C (35°F) and an average temperature of 13°C (55°F). Additionally, December experiences more precipitation, totaling 88 mm (3.5 in) over 16 days, while October sees slightly less at 77 mm (3.0 in) across 12 days. Humidity levels are also high in both months, but December's 92% humidity surpasses October's 89%. For more details about October’s weather, you can visit Zaventem weather in October.
Comparing the weather in December and November reveals some notable differences. December tends to be colder overall, with average temperatures ranging from a minimum of -5°C (23°F) to a maximum of 15°C (60°F), compared to November's range of -3°C (28°F) to 19°C (66°F). Additionally, December experiences increased precipitation levels, totaling 88 mm (3.5 in) over 16 days, while November sees only 53 mm (2.1 in) over 10 days. Both months share a high humidity level of 92%, but December's colder temperatures and higher rainfall contribute to a distinctly different atmosphere. For more details, you can check out the information on Zaventem weather in November.
As December blankets Zaventem in a cool embrace, the weather starkly contrasts with the milder months preceding it. With temperatures dipping to lows of -5°C and an average of just 6°C, winter firmly sets in, inviting a shift from the mild comforts of autumn. The increased humidity and frequent precipitation, recorded on 16 days this month, add to the air of coziness—perfect for enjoying warm drinks indoors. Compared to the more temperate conditions of previous months, December’s chill serves as a reminder that winter is upon us. To understand the broader climate context, explore more at Zaventem Climate.